I say nothing but Jason Parks @ BP takes a look:
What Could Go Wrong in 2012: [Addison] Reed can get a little fastball-dependent, which doesn’t usually matter because his fastball is an explosive pitch with near-elite velocity that he can spot on either side of the plate. He could struggle if his command wavers, or if his slider flattens out a bit, which it did at times in 2011. If he loses the slider, even for a sequence, he becomes more of a one-dimensional arm, and major-league hitters can square up velocity when they know that’s all you have in the tank. To find sustainable success, Reed needs to keep that slider sharp and in sequence while maintaining his command. If that happens—and it should—there is very little to worry about in his immediate future.